✦ LIBER ✦

Structural and spectral assignment by two-dimensional NMR of two new derivatives of the abietane diterpenoid taxodione

✍ Scribed by Benjamín Rodríguez

Publisher: John Wiley and Sons
Year: 2004
Tongue: English
Weight: 87 KB
Volume: 43
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1503

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Two new abietane derivatives were obtained by treatment of the diterpene taxodione with diazomethane. Their structures were determined by mass spectrometry and NMR studies, including one‐ and two‐dimensional experiments. Copyright © 2004 John Wiley & Sons, Ltd.

📜 SIMILAR VOLUMES

Spectral assignment of poly(vinyl acetat

Spectral assignment of poly(vinyl acetate) by one and two dimensional NMR spectroscopy: Revisited

✍ Kaushik Dutta; Munia Mukherjee; A. S. Brar 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 180 KB 👁 2 views

Poly(vinyl acetate) (PVA) prepared by photopolymerization was studied by a combination of one and two dimensional NMR spectroscopy. The 13 C{ 1 H} and 1 H NMR spectra of the homopolymer (PVA) were assigned to the configurational pentads (CH region) and tetrads (CH 2 region). These assignments were s

Structural determination and complete NM

Structural determination and complete NMR spectral assignments of a new diterpenoid obtained from triptonide by biotransformation

✍ Lili Ning; Xiaomei Jiang; Min Ye; Hongzhu Guo; Kaishun Bi; Dean Guo 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 85 KB 👁 1 views

## Abstract A new diterpenoid, 12β,13α‐dihydroxytriptonide, was obtained from the transformed culture of triptonide by __Catharanthus roseus__ cell suspension cultures. The complete ^1^H and ^13^C NMR assignments of the compound were carried out by using DEPT, COSY, HSQC, g‐HMBC and NOESY technique

Structure elucidation and complete NMR s

Structure elucidation and complete NMR spectral assignments of two new dammarane-type tetraglycosides from Panax quinquefolium

✍ Hai-Ping Jiang; Ying-Kun Qiu; Da-Ren Cheng; Ting-Guo Kang; De-Qiang Dou 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 153 KB 👁 1 views

## Abstract Two new saponins were isolated from leaves of __Panax quinquefolium__ and their structures were elucidated as 3β, 12β, 20__S__‐trihydroxy‐25‐methoxydammar‐23‐ene 3‐__O__‐{[β‐D‐glucopyranosyl(1→2)‐β‐D‐glucopyranosyl]‐20‐__O__‐[α‐L‐arabinopyranosyl(1→6)]‐β‐D‐glucopyranoside (1) and 3β, 20

Structure elucidation and complete NMR s

Structure elucidation and complete NMR spectral assignments of two new sesquiterpene lactone xylosides from Lactuca triangulata

✍ Klaudia Michalska; Marek Żylewski; Wanda Kisiel 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 89 KB 👁 1 views

## Abstract Two new sesquiterpene lactone xylosides, derivatives of the guaianolides 9α‐hydroxyleucodin and 9α‐hydroxy‐11,13‐dehydroleucodin, were isolated from roots of __Lactuca triangulata__. Their structures were established on the basis of ^1^H and ^13^C NMR spectra, 2D NMR (HMQC, HMBC, COSY,

1H and 13C NMR spectral assignment of th

1H and 13C NMR spectral assignment of the prenylflavanones sigmoidins A, B and C, by two-dimensional NMR techniques

✍ Jean-Claude Ndom; J. Tanyi Mbafor; Z. Tanee Fomum; Marie-Thérèse Martin; Bernard 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 163 KB 👁 1 views

## Abstract Three prenylflavanones, sigmoidins A, B and C, were studied using one‐ and two‐dimensional NMR techniques. The interpretation of these spectra led to the definitive assignments of all carbon and hydrogen chemical shifts.

Assignment of the stereochemistry of spi

Assignment of the stereochemistry of spiroxamine by two-dimensional NMR spectroscopy and stereoselective chemical synthesis

✍ W. A. Etzel; W. Gau; W. Krämer; U. Stelzer; J. Weissmüller 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 278 KB 👁 2 views

Spiroxamine is a new powdery mildew fungicide in cereals consisting of four biologically active isomers (two diastereomers, four enantiomers). The four isomers were separated by preparative high-performance liquid chromatography (HPLC) on a chiral stationary phase. At this stage it was not possible